Ezra had been treated very well for a traitor who almost caused Moshe's death. For starters, he wasn't put in the basement. Instead, he was locked in one of the empty rooms inside the basecamp, one that had the full view of the mountain from the west. It would be especially breathtaking especially when the sun settled into the horizon in the evening. It wasn't exaggerating to say that he was really treated like an esteemed guest.
Ezra had been prepared for his own brutal death ever since his plan was foiled. That's why, he was utterly bewildered when Moshe's men escorted him here. Not only that, they had even given him a portion of dinner equal to everyone else! At first, Ezra had thought he would get an excruciating death due to poison and had even anticipated the pain coming. Alas, all he got was a warm and full tummy!